chalk -
a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
tailor's chalk chalk used by tailors to make temporary marks on cloth
chalk -
a soft whitish calcite
calcite a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone
chalk a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
chalk -
a pure flat white with little reflectance
whiteness,
white lightness or fairness of complexion; "only the whiteness of her cheeks gave any indication of the stress from which she was suffering"
chalk -
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
amphetamine,
pep pill,
upper,
speed a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
Verb
chalk -
write, draw, or trace with chalk
draw cause to localize at one point; "Draw blood and pus"
chalk -
The prediction that there will be no upsets, and the favored competitor will win.
Verb
chalk -
To apply chalk to anything, such as the tip of a billiardscue.
chalk -
To record something, as on a blackboard, using chalk.
chalk -
To use powdered chalk to mark the lines on a playing field.
chalk -
To record a score or event, as if on a chalkboard.
Wikipedia
Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or CaCO3. It forms under relatively deep marine conditions from the gradual accumulation of minute calcite plates shed from micro-organisms called coccolithophores.
OmegaWiki Dictionary
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chalk A soft, pure, earthy, fine-textured, usually white to light gray or buff limestone of marine origin, consisting almost wholly (90-99%) of calcite.
chalk A writing implement (made of white or coloured chalk) that leaves an impression through being divided into a powder or paste that sticks to the surface.
